[BLOCKER] Deal with "bool", "boolean" and old C standards

[BoogerWooger]

we compile Doom using standard C99 (when "true" and "false" weren't reserved words). "boolean" typedef is here:

zkllvm-doomreplay/zkldoom/doomtype.h

Lines 80 to 85 in 584155e

	typedef enum
	{
	false = 0,
	true = 1,
	undef = 0xFFFFFFFF
	} boolean;

In the same time ZKLLVM's stdlib uses type "bool"(added in later standards) in ctype.h header.

Need to find a workaround for this problem

[BoogerWooger]

still paused - will deal with it when multiple files will be linked